Adsorption of Co(II) from aqueous solutions onto Na-bentonite
Vol. 134 No. 1A (2025), Original Article
Vol. 134 No. 1A (2025)

Adsorption of Co(II) from aqueous solutions onto Na-bentonite

Original Article
https://doi.org/10.26459/hueunijns.v134i1A.7608
Published 2025-03-19
Nguyen Le My Linh*
University of Education, Hue University, 34 Le Loi St., Hue, Vietnam
Nguyen Ngoc Thanh Vy
University of Education, Hue University, 34 Le Loi St., Hue, Vietnam
PDF (Vietnamese)

Keywords

Na-bentonite
Co(II) adsorption
adsorption isotherms and kinetics Na-bentonite
sự hấp phụ Co(II)
động học và đẳng nhiệt hấp phụ

How to Cite

1.
Nguyễn Lê ML, Nguyễn NTV. Adsorption of Co(II) from aqueous solutions onto Na-bentonite. hueuni-jns [Internet]. 2025Mar.19 [cited 2025Apr.26];134(1A):5-11. Available from: http://222.255.146.83/index.php/hujos-ns/article/view/7608
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Abstract

In this work, Na-bentonite was characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), and nitrogen adsorption/desorption. Na-bentonite was used for the removal of Co(II) from aqueous solutions. Co(II) adsorption follows the pseudo-first-order kinetic model. The equilibrium data were analyzed based on the Langmuir and Freundlich adsorption isotherm models. The highest monolayer adsorption capacity for Co(II) at 303 K derived from the Langmuir equation is 25.25 mg/g on Na-bentonite. The obtained thermodynamic parameters demonstrate that the adsorption is spontaneous (∆G° < 0) and endothermic (∆H° > 0), with increased entropy (∆S° > 0) in the investigated temperature range.

https://doi.org/10.26459/hueunijns.v134i1A.7608
PDF (Vietnamese)

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